Author Topic: 440 stroker with EFI and stealth heads?  (Read 3017 times)

Offline torqueaddict

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440 stroker with EFI and stealth heads?
« on: July 02, 2012 - 11:54:35 PM »
440 stroker with EFI and stealth heads, anybody run this kind of set-up? If so and you had it carbed at first what difference did you notice? I almost know my stroker is gonna be carb driven but I am just looking for suggestions for the future.
1972 Challenger  (O O [======R/T=] O O) 1970 clone




Offline Chryco Psycho

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Re: 440 stroker with EFI and stealth heads?
« Reply #1 on: July 03, 2012 - 09:14:24 AM »
I built a 440  with Victor heads & .660 lift roller cam , it dynoed at 702 gross HP & 630 ft lbs , I broke it in with a carb & it was choppy at idle , we then switch it to multiport EFI I was 100% different , it idled like a stock engine as every cylinder would fire , completely drivable in traffic & ran high 11s with street tires at the local track

Challenger - You`ll wish You Hadn`t

Offline torqueaddict

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Re: 440 stroker with EFI and stealth heads?
« Reply #2 on: July 03, 2012 - 12:47:04 PM »
I built a 440  with Victor heads & .660 lift roller cam , it dynoed at 702 gross HP & 630 ft lbs , I broke it in with a carb & it was choppy at idle , we then switch it to multiport EFI I was 100% different , it idled like a stock engine as every cylinder would fire , completely drivable in traffic & ran high 11s with street tires at the local track


Wow thats kinda cool, so efi made a really radical cammed up car run like a stock motor and hid all the power the cam had. Thats petty interesting. I bet that would make for a killer stroker, if it were mapped out that way for the start and pushed the limits of what it were capable of.
1972 Challenger  (O O [======R/T=] O O) 1970 clone

Offline Chryco Psycho

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Re: 440 stroker with EFI and stealth heads?
« Reply #3 on: July 03, 2012 - 06:19:38 PM »
We had to go to a base program from idle to 1500 rpm after that we went to closed loop using all the sensors , we tuned it on a dyno & it ran awesome everywhere , when we got it dialed in , still had some finicky tuning to do while cruising etc . It was hidden under a stock flat RR hood too

Challenger - You`ll wish You Hadn`t

Offline torqueaddict

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Re: 440 stroker with EFI and stealth heads?
« Reply #4 on: July 03, 2012 - 09:27:33 PM »
We had to go to a base program from idle to 1500 rpm after that we went to closed loop using all the sensors , we tuned it on a dyno & it ran awesome everywhere , when we got it dialed in , still had some finicky tuning to do while cruising etc . It was hidden under a stock flat RR hood too

I love efi but it's super expensive, a little to rich for my blood.
1972 Challenger  (O O [======R/T=] O O) 1970 clone

Offline Chryco Psycho

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Re: 440 stroker with EFI and stealth heads?
« Reply #5 on: July 03, 2012 - 10:32:22 PM »
Yup figure $4500 or more

Challenger - You`ll wish You Hadn`t